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https://issues.apache.org/jira/browse/OPENJPA-1901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Dick updated OPENJPA-1901:
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Due Date: (was: 31/Dec/10)
> QueryCacheStoreQuery$CachedObjectId that is not Serializable
> ------------------------------------------------------------
>
> Key: OPENJPA-1901
> URL: https://issues.apache.org/jira/browse/OPENJPA-1901
> Project: OpenJPA
> Issue Type: Bug
> Components: datacache
> Affects Versions: 2.0.0, 2.0.1
> Reporter: Kevin Sutter
>
> In OpenJPA 2.0, OpenJPA tries to put the query result from JOIN query into
> query cache, in addition to put entities into data cache.
> However, the QueryResult containes Object[] of
> org.apache.openjpa.datacache.QueryCacheStoreQuery$CachedObjectId that is not
> Serializable and cause this issue.
> OpenJPA need to be fixed to make
> org.apache.openjpa.datacache.QueryCacheStoreQuery$CachedObjectId serializable.
> Currently, manually adding Serializable to the code works for measuring the
> performance, but we need a more permanent fix.
> I also have a concern whether this type of fix has a ripple effect. The
> CachedObjectId can easily be fixed to be Serializable, but it looks like
> other inner classes of QueryCacheStoreQuery are not Serializable either. Do
> these (and potentially other attributes) need to be Serializable as well? Do
> we need a Unit Test to verify this Serializable capability?
> Final portion of call stack when the Exception happens:
> Caused by: java.io.NotSerializableException:
> org.apache.openjpa.datacache.QueryCacheStoreQuery$CachedObjectId
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1113)
> at java.io.ObjectOutputStream.writeArray(ObjectOutputStream.java:1343)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1107)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:325)
> at java.util.ArrayList.writeObject(ArrayList.java:595)
> at sun.reflect.GeneratedMethodAccessor20.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:618)
> at
> java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:972)
> at
> java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1431)
> at
> java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1382)
> at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1111)
> at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:325)
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